You might get lucky at an Habitat for Humanity Restore. Sometimes they have good stuff, sometimes not. Also scope out sales at your local big box hardware store. Glommed a good deal on a precast sink and white vanity base once.

Demolition .... be methodical and neat. Try to save anything decent and if not wanted, can be donated for reuse. Tile, if you are tearing it out and redoing it, might as well go all the way and do it right with new backer board and all.

The new American Standard toilets work quite well and the price range is from reasonable to, well, you get the drift.

Where are you located? I have a store here called Home Emporium they have a website southeasternsalvage dot com. They sell a lot of closeouts, factory seconds and the sort. My wife called it the Big Lots of Home Stores!

I would take a close look at anything you buy....a buyer beware of sorts